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Mathematics · L3 · Proof Techniques: Direct, Contrapositive & Contradiction

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Three routes to proving 'If P then Q' — direct proof, proof by contrapositive, and proof by contradiction — and how each one reaches the same conclusion.

by @openstemUpdated Mathematics
Goal: prove 'If P then Q'✍️ Direct: assume P, derive QContrapositive: assume ¬Q, derive ¬P🤯 Contradiction: assume ¬Q, derive a contradiction✅ Q established💥 Contradiction reached

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